ISO INTERNATIONAL STANDARD 16231-2 First edition 2015-09-15 Self-propelled agricultural machinery Assessment of stability - Part 2: Determination of static stability and test procedures Machines agricoles automotrices - Evaluation de la stabilité - Partie 2: Determination de la stabilité statique et modes opératoires d'essai Reference number IS0 16231-2:2015(E) ISO International Organization for Standardization @ IS0 2015 Zhejiang Institute of Standardization 5956617 ed without license from IHS IS0 16231-2:2015(E) COPYRIGHT PROTECTED DOCUMENT IS0 2015, Published in Switzerland All rights reserved. Unless otherwise specified, no part of this publication may be reproduced or utilized otherwise in any form written permission. Permission can be requested from either ISO at the address below or ISO's member body in the country of the requester. ISO copyright office Ch. de Blandonnet 8 . CP 401 CH-1214 Vernier, Geneva, Switzerland Tel.+4122749 0111 Fax +41 22 749 09 47 copyright@iso.org www.iso.org Internatinir DrganizationforStandardization Not for Resale, 2015/11/11 08:55:19 No reproduction or networking permited without license from IHS IS0 16231-2:2015(E) Contents Page Foreword ..iv Introduction. .. 1 Scope. ..1 2 Normative references 3 Terms and definitions ..1 4 Determination of the centre of gravity (coG) of a self-propelled machine .2 4.1 Method to determine and to calculate the centre of gravity of the un-laden machine. 2 4.2 Remarks and items to observe during this procedure. .2 4.3 Methods to determine the centre of gravity of a laden machine or a machine with attachments.. ..5 4.3.1 Graphical method. 5 4.3.2 Mathematical method. 7 5 Static overturning angle (SOA) .8 5.1 General. .8 5.2 Lateral roll-over: Machines with one fixed and one swivelling axle (without axle swivel limiting device) ..8 5.2.1 General ..8 5.2.2 Graphical determination of the stability .9 5.2.3 Determination of the stability by calculation .10 5.3 Lateral roll-over: Machines with one fixed and one swivelling axle with swivelling angle limiting device. .11 5.4 Lateral rollover: machines without swivelling axle ..13 5.4.1 Machinesontracks .13 5.4.2 Machines with devices to lock the swivelling axle or to modify the stability triangle ..13 5.4.3 Machines with individual wheel suspension. ..13 5.5 Tip forward and tip rearward. .13 5.5.1 Tip forward. .13 5.5.2 Tip rearward .13 5.6 Body levelling systems .14 5.7 Alternative methods. ..14 6 Comparison of SOA and RSSA ..14 Annex A (informative) Example of calculation of centre of gravity (see Clause 4) ..15 Annex B (informative) Example of calculation of static overturning angle (see Clause 5) ..16 Annex C (normative) Calculation of RSSA. ..18 Annex D (informative) Impact of dynamic effects on roll-over or tip-over ..19 ii nsee=Zhejiang Institute of Standardization 5956617 vithout license from IHS Not for Resale, 2015/11/11 08:55:19